Hell fires, endless winters, or a planet wracked byearthquakes are a few versions of Armageddon visualized by theVikings, Aztecs, and the rest of our ancient ancestors. Butwhich does modern science think will be closest to the truth?Celestial phenomena--the aging of our sun, the expansion ofour universe, and other potentially cataclysmic events--couldtrigger the kind of Armageddon the ancients feared. Whichancient prophecy do scientists believe actually foretells ourdoom? And how close are we to the end of the world?